Piston ring



April 1927' D. c. TEETOR PISTON RING Filed Feb.

- In carr ing out my invention, I

' Patented Apr. 5,

" 1 UNI-TED STATES 1,623,110 PATENT OFFICE. 7

' name; .0. matron, or TIPTQF, momma.

PISTON RING.

'Application filed Fehrnary 25, 1926. Serial No. 90,560.

two para lel series of contiguous c annels that are elongated'anddistrlbuted circumferentially of and pass through thering, thechannelsof etch set being in staggered 5 relation to the channels of the other,one

I end wall of each channel of each set converging toward the other endwallof such channe and crossin an end wall of a con ti one channel in eother set.

' the preferred embodiment of the inventioli, the channels of eachseries are disconnected in the ring itself although lubri "cant may flowbetween the channels of both and each series in the actual use of therin the lubricant flowing between the channe throu h the space betweenthe ring and the cylin er and through the space between the ring andpiston. In the ring of my invention, the volume of lubricant conductingspace passing therethrough is increased without weakening'the ringintegral bridge por=- tions of the ring at the inner cfylindrical sidethereof extending widthwise o the ring from flat faceto fiat face. Bothend walls of each channel of one set desirably cross the adj acentendwall of two contiguous channels in the other set whereb suchtan'integral bridge 4 portion is provided. etween each of the two contiguousends of adjacent channels-in; the

40 two series, a construction which renders the ringsubstantiallyi-nflexible widthwise, especially at its inner c lindricalside.

' The invention will more fully explained in connection with theaccompanying drawing in which'Fig. 1 is a view partially in section andpartially-in elevation. illustrating a ring of my invention, a pistonfurnished with the ring and a cylinder in which the piston reciprocates;Fig.2 is a sectional view on line 2-2 of Fig. 1'; Fig. 3 is a sectionalview on line 3-3 of Fig. 4; Fig, 4 is a view of-a part of the structureappearing in Fig. 2, but on a larger scale; and Fig. 5 is a perspectiveView of a part of the ring with portions shown in section.

My invention is of particular service in connection with internalcombustion hydrovcarbon engines, though the'invention is not to be thusrestricted.

The engine cylinder 1 ma be of any suitable type, the engine cylind er"usually communicating at its inner end with a crank case containing a'bath of lubricating oil from whichworking parts of the engine are sup-'d plied. The piston 2 is of any-suitable or rov1 ev usual form, havingone or more annular piston ring firooves 3, 4 that receive piston rings5, 6. e piston tring groove 4 is nearest the crank case and this groovecontains a piston ring'of my invention, it being unnecessary to providesuch a 'piston ring in-the other piston ring grooves'of the piston. IThe innermost piston ring 6 is formed witlf two parallel. series ofcontiguous channels, channels 7 being included in one series andchannels8 in the other. These channels are elonated circumferentially ofthe ring and are istributed circumferentially of the ring 'andextendfrom the inner cylindrical side of the rin to the outer cylindrical sidethereof, where y" passages for lubricant are af- -forded through thering to conve lubricant between its outer and inner cylin rical side's.

The channels of-each set are in staggered relation tovthe channels oftheother and the end walls of each channel of one set conver e inwardly andcross the adjacent end wa s oftwocontiguous channels in-the other set.Integral bridge portions 9, extendingwidthwise of the ring, are leftupon the inner side of the ring and each between the conti ous ends oftwo'contiguous channels ins e two series, the ring'thus being.sufliciently solid and massive at its inner side to be thereinflexible. Tapering bridge portions 10 are also left, these tapering.bridge port-ionsinterveningbetween the contiguous channels in eachseries. ,The bridge portions 10 between the channels of each seriespreferably terminate atthe outer cyof the close endwise proximity-of thechannels in eachseries, no passages are required in the exteriorcylindrical side of the ring to bring the channels into communication,there being suflicient outward and circumferential flow of lubricant atthe ends of the channels to properly lubricate the exterior ring surfaceportions between the ad'acent channels of each series. The channe defineinwardly conver 'ng spaces inwhich taperin these lu ricant bodies beingconstantly replenished by lubricant flowing into the channels that iscaught from the inner surface of ,the cylinder to 'replace the lubricantwhich flows through the reduced inner ends ofth e channels at theinterior of the ring, the channels, by virtue of their shape,sufliciently retarding the inward flow of the lubricant to permit it toproperly erform its function. The outer or apex end of the bridgeportions. 10 serve to cut through the lubricant oroil film with ease topromote the flowof the lubricant, between thechannels of each series andover 'theiunchan bodies of In ricant are contained,-

neled portions of the outer cylindrical side of the ring. The toolemployed for formmg the channels is desirably a milling tool in the formof a disc wheel having suitable cutting teeth uponits periphery and of adiameter to produce the desired converging of the end walls of thechannels.

Having thus described my invention, I claim:

A piston ring having two parallel series of contiguous and disconnectedchannels that are elongated and distributed circumferentially of andpass through the ring, the'channels of each ,set being in staggeredrelation to the channels of the other, the end walls of each channel ofone set converging inwardly and crossing the adjacent end'iwalls of twocontiguous channels in the other set, thereby to provide a pluralit ofspaced solid bridge portions extending rom end to end of the ringparallel to the axis of the latter.

In witness whereof, I hereunto subscribe my name.

--DANIEL o. TEETOR.

